Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 871

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-871 A Lexington Park-Great Mills MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 236   2021-12-09   
240-871 2 Lexington Park-Great Mills MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-12-11   
240-871 3 Lexington Park-Great Mills MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-12-11   
240-871 9 Lexington Park-Great Mills MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 236   2021-12-09   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.